CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR. PART 7 - FUNCTIONING OF THE DECOMMISSIONING DEVICE
The scope of this paper is to achieve the device functioning steps for the commissioning of the horizontal fuel channels of calandria vessel. The dismantling of the fuel channel is performed by one device which shall provide radiation protection during the stages of decommissioning, ensuring radi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academica Brancusi
2015-05-01
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| Series: | Fiabilitate şi Durabilitate |
| Subjects: | |
| Online Access: | http://www.utgjiu.ro/rev_mec/mecanica/pdf/2015-01/25_Gabi%20ROSCA%20FARTAT,%20Constantin%20POPESCU,%20Constantin%20D.%20STANESCU%20-%20CONSIDERATIONS%20FOR%20THE%20DEVELOPMENT%20OF%20A%20DEVICE%20FOR%20THE%20DECOMMISSIONING%20OF%20THE%20HOR.%20FUEL%20CHANNELS%20IN%20THE%20CANDU%206%20NUCLEAR%20REACTOR.%20PART%207.pdf |
| Summary: | The scope of this paper is to achieve the device functioning steps for the commissioning
of the horizontal fuel channels of calandria vessel. The dismantling of the fuel channel is performed
by one device which shall provide radiation protection during the stages of decommissioning,
ensuring radiation protection of the workers.
For the decommissioning operation design shall be taken to ensure all aspects of security,
environmental protection during decommissioning operation steps and creating and implementing
work procedures resulting from developed decommissioning plan.
The fuel channel decommissioning device is designed for dismantling and extraction of the fuel
channel and its components. The decommissioning operation consists of following major steps:
platform with device positioning to the fuel channel to be dismantled; coupling and locking the device
at the fuel channel; unblock, extract and store the channel closure plug; unblock, extract and store the
channel shield plug; block and cut the middle and the end of the pressure tube; block, extract and
store the end fitting; block, extract and store the half of pressure tube; mounting of the extended
closing plug. The operations steps are performed by the Cutting and Extraction Device and by the
extraction actuator from the device handling elements assembly. After each step of dismantling is
necessary the confirmation its finalization in order to perform the next operation step.
The dismantling operation steps of the fuel channel components are repeated for all the 380 channels
of the reactor, from the front of calandria side (plane R) as well as the rear side (plane R'). |
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| ISSN: | 1844-640X 1844-640X |